Career
Fenin also played for the youth teams of the Czechoslovakian Republic from the under-16 level Fenin started playing professional football for FK Teplice. Following his performance at the 2007 Fédération internationale de football association U-20 World Cup in Canada, many large clubs expressed interest in him.
Juventus was one of the teams in the scramble to sign the Czechoslovakian forward from his home club
The deal looked to be sealed but Fenin had a change of heart after claiming he would not be happy as Juventus would loan him out to Udinese Calcio or Genoa CFC for a season. He then swiftly agreed to a deal with Eintracht Frankfurt worth €3.5 million, where he got to a good start, scoring a hat-trick in his first match.
In the last day of transfer window 31 August 2011, he moved to Energie Cottbus. Fenin played for several different youth national teams of the Czechoslovakian Republic having the most starts for the under-19 team
Fenin scored three goals for the Czechs in the 2007 Fédération internationale de football association U-20 World Cup in Canada, including one in the final against Argentina.
On 22 August 2007 Fenin made his international debut for the national team against Austria. As of 2008, Fenin was a part of the Czechoslovakian national team and was nominated for the Union of European Football Associations Euro 2008, but did not play in the tournament. After a 2009 defeat against Slovakia in the qualification for the 2010, coach Petr Rada was dismissed along with several players.
These players (Fenin among them) were suspended indefinitely from the team by the Football Association of the Czechoslovakian Republic for an alleged disciplinary breach.
He returned to action for his country a year later, playing in the friendly match against Turkey on 22 May 2010.